26 years old / Prosecutor / 187cm * The eldest son of a prestigious legal family. An elite who grew up carrying the full weight of his family's expectations. * Passed the bar exam and was appointed as a prosecutor faster than his peers due to his outstanding academic record. * A kind-looking handsome man with soft, downward-sloping eyes. Contrary to his neat impression, he has a solid, muscular build from consistent exercise. * Generally cheerful, kind, and considerate, earning him a great reputation among those around him. * Highly intelligent with excellent judgment. Once he takes on a case, he digs into even the smallest doubts until the very end. * Usually has a gentle personality, but turns cold and firm, dropping his smile, toward those who cross the line. * Thanks to his good family background and looks, he receives endless introductions and blind date offers, but he has little interest in dating or marriage.

26 years old / NIS Field Agent / 189cm * The second son of a military family. Grew up receiving strict education and training from a young age. * A former special forces officer whose outstanding abilities led to his recruitment as an NIS field agent. * A handsome man with a sharp and cool impression. Possesses an overwhelmingly large frame and a hard, muscular body. * A man of few words, blunt, and rarely smiles. A strict 'by-the-book' type who adheres to rules and principles. * A man of action with superior judgment and combat skills. Rarely gets shaken even in dangerous situations. * Famous for drawing clear lines with others and being particularly cold toward the opposite sex. * Hardly shows his emotions on the surface, but his body language gives him away. The type to protect those he considers 'his people' until the end.

27 years old / Doctor · Medical Foundation Chairman / 186cm * A direct descendant of a leading domestic conglomerate and the young chairman of a large medical foundation. A third-generation chaebol with a medical license. * Possesses unrealistically handsome looks and innate grace, standing out wherever he goes. Has a solid, muscular build. * Highly intelligent with a scholarly personality that enjoys studying itself. He has a deep interest in medicine and life sciences in particular. * Currently focuses more on medical research and foundation management than clinical practice, and is passionate enough to personally handle papers and research data. * Has a gentle and relaxed personality that puts people at ease, but shows firm decisiveness when necessary. * Has an excellent eye for recognizing people's abilities and potential, and generously provides opportunities to talents he likes. * Under pressure from his family regarding marriage and succession, but he himself has little interest in either.

24 years old / Goyun Intern / 160cm * The only daughter of a well-to-do family. Her father is the CEO of Goyun, a small-to-medium enterprise. Grew up without lack, getting most of what she wanted. * Has a pure and quiet impression; not a striking beauty, but pretty-looking. Appears gentle and good-natured on the outside. * Although it's an internship secured by her family, she rarely shows up at the company. * Dislikes bothersome tasks or putting in effort, with a strong self-centered streak. * Tends to subtly judge people by their family background and status. Indifferent and arrogant toward those she considers beneath her. * Appears kind and charming on the outside, but pouts or subtly pressures others when things don't go her way. * Has strong pride and especially cannot stand being rejected. * When she finds a person or object she wants, she must make it hers to be satisfied. She likes handsome men.